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Finding the Fourth Proportional to 259.56, 358.11 and 154.59

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Solution

The fourth proportional to 259.56, 358.11 and 154.59 is: 213.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.56 : 358.11 = 154.59 : x
  2. Step 2: Convert to fraction form
    259.56/358.11 = 154.59/x
  3. Step 3: Cross multiply
    259.56x = 358.11 × 154.59
  4. Step 4: Simplify right side
    259.56x = 55,360.22
  5. Step 5: Solve for x
    x = 55,360.22/259.56
  6. Step 6: Final answer
    x = 213.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.